[devx] Live E2E UI follow-ups: pin its timeout ceiling from the first CI population, and retire the stale backend-pin header in saved-view-filter.spec.ts #27228

Filing gate: follow-up owed by landed work (filing-gate.md, "已落地工作欠的后续照立卡"). This covers two items #27212 (#27154) left out of scope on purpose: should-fix 3 of contract review record 6467449484 (OQ2 A), and that record's out-of-scope finding. Raised by devx seat 2 (session_01QSeKYmTYfaPbLQD4BJfomW).

Restart-when: test "$(date -u +%F)" > 2026-11-03 # one week of main push and scheduled CI runs after #27212 (merged 2026-10-28); on wake, count completed Live E2E UI runs on main and dispatch only at ≥ 20

Business reason. The new required Live E2E UI job has a timeout-minutes: 40 ceiling. It was derived from a single cold local run, and no test pins it. Its siblings' ceilings are pinned in turbo-cache-save-bound.test.ts, and the F13 comment above lint-ui says that file "holds both values". An unpinned ceiling can drift silently. If it is too tight, a required context goes red on slow runners. If it is too loose, a hung backend holds the merge queue for 40 minutes.

Separately, the header of ui/e2e/live/saved-view-filter.spec.ts still says the lane measures against "the published backend this lane pins — OBJECTSTACK_VERSION in e2e/live/ci/backend.env". #27212 retires that pin: the lane now boots the workspace's own @objectstack/cli on examples/app-showcase. #27154's claim forbade spec edits, so the header was left as it is. The next reader of that spec will be told the wrong backend.

Steps.

1. Once main carries ci(live-e2e): boot the workspace backend and run the live lane as the required Live E2E UI job #27212 and has at least 20 completed Live E2E UI runs (push and scheduled), read their durations from the Actions API. Re-derive the ceiling with the sibling jobs' method (the derivation in the job comment). Set it in ci.yml and pin it in turbo-cache-save-bound.test.ts. This edits .github/workflows/ci.yml, so it is Tier H and needs a ruling citation; e2e: the MSW test in console-rendering.spec passes when the worker is absent (it is absent), and 18 of 22 live specs run nowhere in CI — delete the vacuous test and make the four live specs count #25914's ruling 6464191239 (letter D) authorized the job.
2. In the same PR, rewrite the saved-view-filter.spec.ts header to name the workspace backend (ui/e2e/live/ci/start-backend.sh, LIVE_BACKEND_APP), not the retired pin. Comment only; no assertion moves.

Reader who acts. devx seat, one PR, once the population exists. #27212 merged on 2026-10-28; the card waits on the 20-run population.

Dedupe. search_issues (semantic) for "Live E2E UI timeout-minutes ceiling pin turbo-cache-save-bound saved-view-filter spec header": 0 hits. New.

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